chore(abi-drift): restore browser-mcp to allowlist after #134 landed (#137)

## Summary

browser-mcp was removed from the abi-drift allowlist in #133/#136
because it had genuine Class D drift (`BrowserAction.Type` ↔ Zig
`type_text`). That drift was fixed cartridge-side in #134 (Idris2 ADT
`Type` → `TypeText`), which is now on main.

This restores browser-mcp to the audited-green allowlist:

- count `65 → 66`
- alphabetic position between `arango-mcp` and `buildkite-mcp`
- comment block notes the restoration cause (post-#134) rather than the
prior `REMOVES` rationale
- residual-drift count trimmed `15 → 14`

## Verification

The fix is on `main` already:

```
$ grep -n 'TypeText\|browserActionToInt\|intToBrowserAction' cartridges/browser-mcp/abi/BrowserMcp/SafeBrowser.idr
59:  | TypeText   -- ^ Type text into an element matching a CSS selector.
126:browserActionToInt TypeText   = 2
140:intToBrowserAction 2 = Just TypeText
```

CI will re-verify under the abi-drift workflow with browser-mcp
included; the verifier runs `iseriser` against the paired `Safe*.idr` +
`*_ffi.zig`.

## Refs

- hyperpolymath/standards#92 (cartridge ABI drift taxonomy)
- hyperpolymath/standards#156 (Class D sub-issue)
- #133, #134, #136 (predecessor PRs)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Author: hyperpolymath

.github/workflows/abi-drift.yml

@@ -71,18 +71,19 @@ jobs:
       - name: Resolve cartridge allowlist
         id: discover
         # 80 cartridges in the tree carry a paired Safe*.idr + *_ffi.zig.
-        # 65 are audited green against the Phase 1b emitter + Phase 1
+        # 66 are audited green against the Phase 1b emitter + Phase 1
         # verifier (re-run 2026-05-20 after iseriser#20 / #21 / #22 merged:
         # GADT-skip in the emitter, runtogether candidate for multi-cap
         # acronyms, and terminal `false` switch-arm tolerance in the
         # verifier). Versus the previous 56-cartridge allowlist this:
         #   * ADDS 10 cartridges that the three iseriser fixes unblocked
         #     (cloud, comms, container, git, gitlab-api, ml,
         #     mongodb, queues, research, vordr)
-        #   * REMOVES browser-mcp — newly-detected genuine drift
-        #     (`BrowserAction.Type` ↔ Zig `type_text`; cartridge-side
-        #     fix, not a verifier defect)
-        # 15 cartridges carry real drift across Classes B/C/D — see
+        #   * RESTORES browser-mcp — the Class D `BrowserAction.Type` ↔
+        #     Zig `type_text` drift was fixed in cartridge-side PR #134
+        #     (`Type` renamed to `TypeText` in the Idris2 ADT to match
+        #     the underlying Zig FFI tag).
+        # 14 cartridges carry real drift across Classes B/C/D — see
         # standards#92 plus open sub-issues standards#150-155 (Class C)
         # and standards#156 (Class D). Class P (verifier parser limit)
         # and Class E (malformed Idris2 source) are now empty: iseriser#22
@@ -100,6 +101,7 @@ jobs:
             echo 'agent-mcp'
             echo 'airtable-mcp'
             echo 'arango-mcp'
+            echo 'browser-mcp'
             echo 'buildkite-mcp'
             echo 'clickhouse-mcp'
             echo 'cloud-mcp'